Control techniques and evaluation of pathogen influence on African mahogany ( Khaya grandifoliola C. Dc.) infected by La
- PDF / 275,318 Bytes
- 6 Pages / 547.087 x 737.008 pts Page_size
- 29 Downloads / 158 Views
Control techniques and evaluation of pathogen influence on African mahogany (Khaya grandifoliola C. Dc.) infected by Lasiodiplodia theobromae Pat. Thaís Vieira Webber & Tulio Veríssimo Martins & Daniella Vieira Cândida & Cristiane Aparecida Fioravante Reis & Marcos Gomes da Cunha & Carlos Roberto Sette Jr & Érico de Campos Dianese
Accepted: 10 November 2020 # Koninklijke Nederlandse Planteziektenkundige Vereniging 2020
Abstract The constant demand by society for quality timber associated with reduced exploitation of native forests has promoted the use of alternative species such as the African Mahogany (Khaya grandifoliola C. Dc.). The production cycle of this species began with the introduction of seeds in the 1970s and good silvicultural performance of the first planted matrix trees, then spreading throughout several Brazilian regions and resulting in increased occurrence of pest insects and diseases, such as African mahogany canker (Lasiodiplodia theobromae Pat.). In this context, this work aimed to identify control methods and to analyze the damage caused by canker in symptomatic African mahogany trees. Scraping and chemical treatments were carried out in different concentrations to analyze the best method to prevent an increase of lesions caused by the pathogen. The anatomical characteristics and basic density of wood with and without canker were evaluated. It was observed that scraping until reaching the healthy tissue is an effective method of control which stimulates the healing process after a certain period. For the chemical treatment without scraping, Nativo® fungicide is efficient through direct application.
T. V. Webber : T. V. Martins : D. V. Cândida : M. G. da Cunha : C. R. Sette Jr : É. d. C. Dianese (*) Universidade Federal de Goiás, Escola de Agronomia, Goiânia, Goiás, Brazil e-mail: [email protected] C. A. F. Reis Embrapa Florestas , Colombo, Paraná, Brazil
The presence of canker promoted an increase in wood density and changes in anatomical characteristics. Keywords Lasiodiplodia theobromae . Chemical treatment . Forest pathology . Wood fungi
The Khaya grandifoliola species belonging to the Meliaceae family originated from the West African countries of Benin, Burkina Faso, Cameroon, Ivory Coast, Gana, Guiné-Bissau, Liberia, Malawi, Nigeria, Central African Republic, Congo, Serra Leoa, Tanzania, Togo and Uganda (Reis et al. 2019), and is popularly known as African Mahogany. The first plantations of this species in Brazil were established in the North Region in 1976, and today it is a widespread species (Ribeiro et al. 2017). The plantations were encouraged with the purpose of recovering degraded areas, taking advantage of Brazilian regions with suitable edaphoclimatic characteristics and for replacing Brazilian mahogany wood (Swietenia macrophylla King), which was heavily attacked by Hypsiphyla grandella Zeller (Lepidoptera: Pyralidae) larvae (Klein et al. 2016). Interesting economic characteristics made African Mahogany a good option to supply a growing and more demanding consumer market (Fra
Data Loading...
